Rotary disk to facilitate plow penetration



M y 20, 5 w. D. DRUMMOND ROTARY DISK TO FACILITATE PLOW PENETRATION Filed Oct. "29, 1947 INVENTOR. W/Yfiam D. Drum/none BY P P Atty.

read in conjunction with Patented May 20, 1952 ROTARY DISKlTO FACILITATE PLOW'.

. PENETRATION William D.'5Drummond, Hamilton, Ontario, Cam:

ada, assignor, bymesne assignments,;to*lntere' national. Harvester, Company, Chicago, Ill, a

corporation 'of- New Jersey Application Gctober 29, 1947, Serial No. 782;74'7

v 3 Claims.

This invention relates to agricultural implements and particularly to a plow adaptedto be propelled through the soil by a'tractor. or the like.

A plow bottom penetrates deeply into the .soil and considerable power or tractive effort is required for its propulsion. When a plurality of plow bottoms are to be propelled through the soil,,or when abnormally hard ground. is en-' countered the tractive effort required is sogreat that slippage of the drive wheels occurs. This results in high fuel consumption as well as considerable wear and tear on the tires.

An object of the present invention is to provide a plow structure which avoids these disadvantages and which may be propelled through the soil with a minimum of tractive effort.

Another object of the invention is to provide a multibottomplow having incorporated therewith improved means for facilitating passage thereof through the soil.

A further object of the invention is to provide a tractor drawn plow comprising conventional plow bottomsand having. incorporated therewith a disk to facilitate penetration of the plow bottoms in the soil, and wherein the, disk is driven by tractor power.

Other objects and advantages will become clea from the following detailed description when the accompanying drawings, wherein:

Figure 1 is a plan viewof a two-bottom trail behind plow embodying the features of the present invention; and

Figure 2 is a side elevation of the structure shown in Figure 1.

Referring to the drawings, the numeral Ii) designates the body of a tractor having transverse rear axle structures II and rear drive wheels [2, only one of which is shown. The tractor is provided with a conventional draw bar I3 to which is connected in draft receiving relation a trail behind implement in the form of a twobottom moldboard plow comprising a frame generally indicated by the numeral Hi.

The plow of the present invention includes a pair of longitudinally extending laterally spaced plow beams I5 and I6, the latter beam being longer than beam l5 and extending rearwardly thereof. Beams l5 and it have secured thereto depending plates I1 and i8 respectively. These plates are provided with bearings for the reception of the transverse portions l9 and 23 of crank axles 2i and 22 respectively. Crank axle 2| has mounted thereupon a furrow wheel 23 and a land wheel 24 is mounted upon the crank axle 22.

While'no lifting struct'ure is shown it maybe understood that-the crank axles -2 Land 22 may be rocked in'a generally verticaldirection to raise and lower frame [4 with respect tothe .wheels23 and24. A conventional furrow wheel..25is like wise provided to'support the' rea-r end of the implement.

The forward ends-0f the beams: l5 andrl6zare connected by a transverselyextending draft bar 26 to which is connected a hitch bar-121 braced by anotherbar 28; 2 Hitch bar- 2'I is pivotally connected by a pin 23" to the draw .bara I31 of the tractor. Y

It willbe noted that thebeams 1,5 and: I6 curve downwardly at. their rear ends and have. secured thereto, respectively, plow bottoms 30 and-31pm.- vided respectively withzearth penetrating'cutting edges 32 and 33; and with earth: turningmolde boards 34 and 35. Conventional-vertically: ex-. tending rolling colters 36 areprovided -tmextend in advance. of. and open a vertical-path aheadof the plow bottoms .30 and 3 l As pointed out beforepin anyordinary *mold-. board plow where the draft supplied-by: the .tractor propels the working tools through the ground; difficulties are often encountered inithefor'm of skidding tractor wheels when hard earth or. other unusual draft conditions are encountered. 1 AC-v cording to r the present invention; .therefore, means are provided .toiIighten -the draft load upon the tractor drive wheels so thattheimple-J ment may be propelled more easily through the soil and this is accomplished by a mechanism now to be described.

Plow bottom 33 has secured thereto in a suitable manner a bearing 31 in vertical alignment with a bearing 38 secured to the right hand plow beam l5. Mounted in the bearings 31 and 38 is a vertically extending shaft 39 having secured to its lower end a substantially horizontally extending rotary cutting disk 40. The cutting edge of the disk 40, as will be obvious from Figure 1, extends well in advance of and to opposite sides of cutting edge 32 of plow bottom 30. The disk 40 is mounted upon the shaft 39 below the plow bottom 30 and closely adjacent thereto so that a horizontal path is opened in the earth to facilitate the penetration of the plow bottom and to ease its passage through the soil. The upper end of shaft 39 extending above the bearing 38 has mounted thereupon a bevel gear 4| which meshes with a bevel gear 42 mounted upon a horizontal shaft 43 which extends forwardly and is connected by a universal joint 44 with a power take-off shaft 45 extending rearwardly from the tractor and driven 3 by tractor power. The operation of power takeoff shaft 45 thus operates through shaft 43, bevel gears 42 and 4|, and shaft 39 to rotate the horizontal disk 40.

Also in mesh with gear 4| is a bevel gear 46 mounted upon a shaft 41 which has another gear 48 secured'to the end thereof. Shaft 41 extends rearwardly and laterally, and gear 48 meshes with a bevel gear 49 mounted upon the upper end of a shaft 50 which is rotatably mounted in bearings 5| and 52 secured respectively to the beam l6 and plow bottom 3 The lower end of shaft 5|) is provided with a horizontally extending rotary disk 53 similar in every respect to disk 40. Disk 53 is likewise mounted directly below the plow bottom 3| and its cutting edge extends forwardly and to opposite sides of the cutting edge 33 so that disk 53 likewise penetrates the earth in advance of and prepares the way for plow bottom 3| to facilitate its penetration of the soil. As will be noted in Figure l, the inner edge of disk 40 extends beyond and laps the inner edge of the disk 53, the amount of lap being indicated in dotted lines in Figure 1. This lapping of the disks 40 and 53 causes the two disks to open a continuous transverse path in the soil to facilitate the passage of the plow bottoms 3i! and 3|. Thus a part of the draft load is taken from the draw bar l3 and assumed by the power take-off shaft 45 of the tractor, and the load upon the drive wheels l2 of the tractor is thus lightened.

It is believed that the nature and function of the present invention will be clearly understood from the foregoing description. The invention has been described in its preferred embodiment and it should be understood that modifications will be made therein without departing from the spirit of the invention or the scope of the appended claims.

What is claimed is:

l. The combination with a tractor having a power take-off shaft of an agricultural implement comprising a supporting frame, a pair of laterally spaced plow bottoms mounted on the frame, each said bottom having a share portion, a vertically extending shaft carried by the frame and secured to each said plow bottom, a horizontal rotary disk mounted parallel to the ground on each shaft below and extending forwardly and to opposite sides of said share portion to penetrate the earth in advance of said plow bottom,

said disks being arranged in longitudinally spaced lapping relation, and a driving connection between the power take-oif shaft on the tractor and said disks for rotating the latter.

, 2. The combination with a tractor having a power take-off shaft of an agricultural implement comprising a supporting frame, an earth working tool mounted on the frame, a vertically extending shaft carried by the frame and secured to said tool, a horizontal rotary disk mounted on the lower end of the shaft below the tool parallel to the ground and extending forwardly of and to opposite sides thereof to penetrate the earth in advance of the tool and open a path therefor, and a driving connection between the power take-01f shaft on the tractor and said disk shaft for rotating the disk.

3. The combination with a tractor having a drawbar and a power take-off shaft of an agricultural implement comprising a wheeled frame connected to the drawbar, laterally and longitudinally spaced plow bottoms carried by the frame, each said bottom having a cutting edge and a moldboard, a vertically extending shaft associated with each said bottom and secured thereto, a horizontal rotary disk mounted on each said shaft parallel to the ground having its forward cutting edge extending in advance of the cutting edge of said plow bottom to open a path therefor and facilitate its penetration of the soil, and a driving connection between said shafts and the tractor power take-ofi shaft.

WILLIAM D. DRUMMOND.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 549,507 Evans Nov. 12, 1895 630,367 Lovett Aug. 8, 1899 709,028 Mulrony Sept. 16, 1902 994,648 Monaghan June 6, 1911 1,697,679 Davidson Jan. 1, 1929 2,244,538 Kasten June 3, 1941 FQREIGN PATENTS Number Country Date 81,535 Germany Oct. 25, 1920 349,706 Germany Mar. 6, 1922 

